Ken P is 100% right, as are all the others. The roof liner will also come down if you pull/wiggle the visor down out of it's socket....that would be necessary only if you will be running wires for a switch to the OH console. I placed my switches on the left front dash just to the lower right of the air duct. Great/easy access for wiring and turning on/off both sets of my off-road lights. Check out some of the other threads.
Be sure you seal the hole in the roof very well!!!
Ric
OMAHOG/IHOG
Hum2@cox.net